| Synthesis, crystal structure and properties of a new organic-inorganic hybrid Dawson-like polyoxotungstate [Co(2,2''''-bpy)3]2[Co(2,2''''-bpy)2Cl][Co(2,2''''-bpy)2]H2-[SbW18O60]·4H2O |
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| 作者单位： | WANG JingPing（Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China） ;MA PengTao（Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China） ;NIU JingYang（Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China） ; |
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| 基金项目： | Supported by the Program for New Century Excellent Talents in University of Henan Province (2005HANCET-02), the Natural Science Foundation of Henan Province, the Program for Training Young Excellent Cadreman Teachers in University of Henan Province, the Stress Foundation of Henan University(05ZDZR002) |
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| 摘 要： | A new organic-inorganic hybrid polyoxometalate based on Dawson-like polyoxotungstate anion [SbW18O60]9-, formulated [Co(2,2'-bpy)3]2[Co(2,2'-bpy)2Cl][Co(2,2'-bpy)2]H2[SbW18O60]·4H2O (2,2'-bpy= 2,2(-bipyridine) has been synthesized from Sb2O3, Na2WO4, CoCl2, and 2,2'-bipyridine materials by hydrothermal method, and which was characterized by elemental analyses, IR, XPS, EPR, TG, and X-ray single crystal diffraction. Structure analysis shows that the polyoxoanion self-assembled under hydrothermal conditions consists of a Dawson-like polyoxotungstate cluster anion [SbW18O60]9- encapsulating a pyramidal {SbO3} group within the {W18} cluster cage. EPR spectra show that the high-spin octahedral CoⅡ and low-spin CoⅡ ions coexist in the title compound. Magnetic properties indicate that the compound is antiferromagnetic.
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| 收稿时间： | 2007-01-11 |
| 修稿时间： | 2007-07-19 |
Synthesis, crystal structure and properties of a new organic-inorganic hybrid Dawson-like polyoxotungstate [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O |
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| Wang JingPing , Ma PengTao and Niu JingYang. Synthesis, crystal structure and properties of a new organic-inorganic hybrid Dawson-like polyoxotungstate [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O[J]. Science in China(Chemistry), 2007, 50(6): 784-789. DOI: 10.1007/s11426-007-0140-7 |
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| Authors: | Wang JingPing Ma PengTao Niu JingYang |
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| Affiliation: | (1) Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475001, China |
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| Abstract: | A new organic-inorganic hybrid polyoxometalate based on Dawson-like polyoxotungstate anion [SbW18O60]9−, formulated [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O (2,2′-bpy=2,2′-bipyridine) has been synthesized from Sb2O3, Na2WO4, CoCl2, and 2,2′-bipyridine materials by hydrothermal method, and which was characterized by elemental analyses, IR, XPS, EPR, TG, and X-ray single crystal diffraction. Structure analysis shows that the polyoxoanion self-assembled under hydrothermal conditions consists of a Dawson-like polyoxotungstate cluster anion [SbW18O60]9− encapsulating capsulating a pyramidal {SbO3{ group within the {W18{ cluster cage. EPR spectra show that the high-spin octahedral Co∥ and low-spin Co∥ ions coexist in the title compound. Magnetic properties indicate that the compound is antiferromagnetic. Supported by the Program for New Century Excellent Talents in University of Henan Province (2005HANCET-02), the Natural Science Foundation of Henan Province, the Program for Training Young Excellent Cadreman Teachers in University of Henan Province, the Stress Foundation of Henan University(05ZDZR002) |
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| Keywords: | polyoxometalate Dawson-like crystal structure hydrothermal synthesis |
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